<!DOCTYPE html>
<html>
  <head>
    <script type="text/javascript" src="../../d3.js"></script>
    <script type="text/javascript" src="../../d3.csv.js"></script>
    <script type="text/javascript" src="../../d3.time.js"></script>
    <style type="text/css">

body {
  font: 10px sans-serif;
  margin: 0;
}

path.line {
  fill: none;
  stroke: #666;
  stroke-width: 1.5px;
}

path.area {
  fill: #e7e7e7;
}

.axis path, .axis line {
  fill: none;
  stroke: #fff;
  shape-rendering: crispEdges;
}

    </style>
  </head>
  <body>
    <script type="text/javascript">

var m = [20, 20, 20, 20],
    w = 960 - m[1] - m[3],
    h = 140 - m[0] - m[2],
    parse = d3.time.format("%b %Y").parse;

// Scales. Note the inverted domain for the y-scale: bigger is up!
var x = d3.time.scale().range([0, w]),
    y = d3.scale.linear().range([h, 0]);

// X-axis.
var xAxis = d3.svg.axis()
    .scale(x)
    .tickSize(-h);

// An area generator, for the light fill.
var area = d3.svg.area()
    .interpolate("monotone")
    .x(function(d) { return x(d.date); })
    .y0(h)
    .y1(function(d) { return y(d.price); });

// A line generator, for the dark stroke.
var line = d3.svg.line()
    .interpolate("monotone")
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.price); });

d3.csv("../data/stocks.csv", function(data) {

  // Nest values by symbol.
  var symbols = d3.nest()
      .key(function(d) { return d.symbol; })
      .entries(data);

  // Parse dates and numbers. We assume values are sorted by date.
  // Also compute the maximum price per symbol, needed for the y-domain.
  symbols.forEach(function(s) {
    s.values.forEach(function(d) { d.date = parse(d.date); d.price = +d.price; });
    s.maxPrice = d3.max(s.values, function(d) { return d.price; });
  });

  // Compute the minimum and maximum date across symbols.
  x.domain([
    d3.min(symbols, function(d) { return d.values[0].date; }),
    d3.max(symbols, function(d) { return d.values[d.values.length - 1].date; })
  ]);

  // Add an SVG element for each symbol, with the desired dimensions and margin.
  var svg = d3.select("body").selectAll("svg")
      .data(symbols)
    .enter().append("svg:svg")
      .attr("width", w + m[1] + m[3])
      .attr("height", h + m[0] + m[2])
    .append("svg:g")
      .attr("transform", "translate(" + m[3] + "," + m[0] + ")");

  // Add the area path elements. Note: the y-domain is set per element.
  svg.append("svg:path")
      .attr("class", "area")
      .attr("d", function(d) { y.domain([0, d.maxPrice]); return area(d.values); });

  // Add the x-axis.
  svg.append("svg:g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + h + ")")
      .call(xAxis);

  // Add the line path elements. Note: the y-domain is set per element.
  svg.append("svg:path")
      .attr("class", "line")
      .attr("d", function(d) { y.domain([0, d.maxPrice]); return line(d.values); });

  // Add a small label for the symbol name.
  svg.append("svg:text")
      .attr("x", w - 6)
      .attr("y", h - 6)
      .attr("text-anchor", "end")
      .text(function(d) { return d.key; });
});

    </script>
  </body>
</html>
